Use xdg-settings in Chrome distrubtion if script on PATH fails
Use xdg-settings in Chrome distrubtion if script on PATH fails

This change updates Chrome so that it tries to use xdg-settings on the PATH first.
If that fails with error code 1 (syntax error), and the xdg-settings on PATH
isn't xdg-settings distributed with Chrome, then try the script distributed with
Chrome

BUG=83557
TEST=Manual testing performed with more testing to come once xdg-settings changes are upstreamed.


Review URL: http://codereview.chromium.org/7212024

git-svn-id: de016e52bd170d2d4f2344f9bf92d50478b649e0@91668 0039d316-1c4b-4281-b951-d872f2087c98

gavinp/chromium,adobe/chromium,ropik/chromium,gavinp/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,yitian134/chromium,adobe/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,adobe/chromium,yitian134/chromium,yitian134/chromium,adobe/chromium,gavinp/chromium,gavinp/chromium,ropik/chromium,ropik/chromium,yitian134/chromium,ropik/chromium,adobe/chromium,gavinp/chromium,yitian134/chromium,gavinp/chromium,gavinp/chromium